Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer

A technology of laser Raman spectroscopy and pesticide residues, which is used in measurement devices, Raman scattering, material excitation analysis, etc., can solve the problems of difficult to overcome the influence of fluorescence effect, inability to detect pesticide residues in fruits and vegetables, and sensitivity limitations, etc. Low power consumption, easy to carry, avoid stray light effect

Inactive Publication Date: 2012-07-11
EAST CHINA JIAOTONG UNIVERSITY
View PDF6 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Experts from Germany, Israel and New Zealand applied near-infrared spectroscopy technology to develop portable detection equipment, which realized rapid detection of fruit sugar content, defects, maturity, etc., but due to weak signal and low measurement accuracy, it cannot be used for Detection of Pesticide Residues in Fruits and Vegetables
[0006] Paten

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer
  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer
  • Device and method for fruit and vegetable pesticide residues based on laser Raman spectrometer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Embodiment 1. A rapid detection device for pesticide residues in fruits and vegetables based on laser Raman spectroscopy, including hardware devices and software systems; wherein: the software system includes a Raman spectrum acquisition module, an analysis module, and a fingerprint library module; the hardware device includes Raman Probe, Raman spectrum detector and data acquisition device; Raman probe includes laser 4, optical fiber 5, fastening nut 6, lens 7, band pass filter 8, bidirectional color filter 9, sample holder 11, probe Housing 13, reflector 14; Raman spectrum detector includes: fiber coupler 15, lens 7, aperture 16, focusing lens 17, collimator lens 18, grating 19, detector 20, cut-off filter 21; data acquisition The device includes: data line 22, processor 3, RS232 cable 2 and display 1; display 1, RS232 cable 2, processor 3, laser 4, optical fiber 5, fastening nut 6, lens 7, sample holder 11 , The probe housing 13, the reflector 14, the fiber coupler 15...

Example Embodiment

[0035] Embodiment 2. A rapid detection device for pesticide residues in fruits and vegetables based on laser Raman spectroscopy, including: display screen 1, RS232 cable 2, processor 3, laser 4, optical fiber 5, fastening nut 6, lens 7, sample holder 11. The probe housing 13, the reflector 14, the fiber coupler 15, the small hole 16, the focusing lens 17, the collimator lens 18, the grating 19, the detector 20, the cut-off filter 21, and the data cable 22 are all fixed on the housing 12. The display screen 1 is connected to the processor 3 through the RS232 cable 2, the processor 3 is connected to the cut-off filter 21 through the data line 22, the cut-off filter 21 is set on the detector 20, the laser 4 is connected to the optical fiber 5, the optical fiber 5 Fix on the probe housing 13 by tightening the nut 6. The lens 7, the band pass filter 8, the bidirectional color filter 9, the ground glass 10, the reflector 14, the band pass filter 8, and the lens 7 are all fixed in sequ...

Example Embodiment

[0036] Embodiment 3. A rapid detection device for pesticide residues in fruits and vegetables based on laser Raman spectroscopy, wherein a small hole 16 is provided between two lenses 7 provided on the other side of the fiber coupler 15 and the other lens 7.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a device and a method for fruit and vegetable pesticide residues based on a laser Raman spectrometer. With the development of agricultural technology, various pesticides are used for prevention of fruit and vegetable pests in order to meet people's requirements in daily life by efficiently producing the fruits and vegetables with high yield, thus pesticide residues are formed on the surfaces of the fruits and vegetables unavoidably. The device for fruit and vegetable pesticide residues based on the laser Raman spectrometer comprises a display screen, a RS232 cable, a processor, a laser device, optical fibers, clamp nuts, a lens, a sample support, a probe housing, a reflective mirror, an optical fiber coupler, a pinhole, a focus lens, a collimating lens, optical gratings, a detector, a cut-off optical filter and a data line which are all fixed on the casing of the device. The device for fruit and vegetable pesticide residues based on the laser Raman spectrometer has the advantages of being compact in structure, low in power dissipation, high in stability, convenient to carry, and suitable for field detections. During detection, no movement of the device is needed, detection results are not affected by external vibrations, and the detection precision and speed are high.

Description

technical field [0001] The invention relates to a rapid detection device for agricultural pesticide residues in the field of agriculture, in particular to a rapid detection device and method for pesticide residues in fruits and vegetables based on laser Raman spectroscopy. Background technique [0002] With the development of agricultural technology, in order to produce various fruits and vegetables with high yield and high efficiency to meet people's daily needs, various pesticides are used to prevent and control pests and diseases of fruits and vegetables, so it is inevitable to form pesticide residues on the surface of fruits and vegetables. Excessive pesticide residues not only endanger the safety of consumers, but also become a green trade barrier that hinders the export of agricultural products in my country. [0003] The high-precision analytical instruments equipped in the agricultural product testing center are highly sensitive, highly specialized, and have complex ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/65G01N21/15
Inventor 刘燕德孙旭东郝勇欧阳爱国蔡丽君
Owner EAST CHINA JIAOTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap